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  <title>This function returns the UID for the given message sequence number</title>
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  <div id="layout-content"><div id="function.imap-uid" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">imap_uid</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imap_uid</span> &mdash; <span class="dc-title">This function returns the UID for the given message sequence number</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.imap-uid-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>imap_uid</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$imap_stream</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$msg_number</code></span>
   ) : <span class="type">int</span></div>

  <p class="para rdfs-comment">
   This function returns the UID for the given message sequence
   number. An UID is a unique identifier that will not change over
   time while a message sequence number may change whenever the
   content of the mailbox changes.
  </p>
  <p class="para">
   This function is the inverse of <span class="function"><a href="imap_msgno.html" class="function">imap_msgno()</a></span>.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.imap-uid-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    <dt>
<code class="parameter">
imap_stream</code></dt>
<dd>
<p class="para">由 <span class="function"><a href="imap_open.html" class="function">imap_open()</a></span> 返回的 IMAP 流。</p></dd>

    
     <dt>
<code class="parameter">msg_number</code></dt>

     <dd>

      <p class="para">
       The message number.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.imap-uid-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   The UID of the given message.
  </p>
 </div>

 <div class="refsect1 notes" id="refsect1-function.imap-uid-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    This function is not supported by POP3 mailboxes.
   </p>
  </p></blockquote>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.imap-uid-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="imap_msgno.html" class="function" rel="rdfs-seeAlso">imap_msgno()</a> - Gets the message sequence number for the given UID</span></li>
   </ul>
  </p>
 </div>

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